when you solve all 4 equations, the first step is to move the constant term from the left side to the right side.
then you would divide both sides of the equation by the coefficient of the variable to complete the process.
however, note that the coefficient of k in the first equation is 1, so you do not need to do this step

can you answer both? or just one? cuz i think it's both second n third..
in the second one,
we have to exchange -3b and 7, so that the b would be positive,
and then evaluate -7 -22 = -29
then -29 divided by 3
so it's 3 steps
the same as third one